Remove redundant error-to-string fn (#288)

.gitignore

@@ -25,3 +25,4 @@ yarn-error.log*
 # rust
 src/wasm-lib/target
 public/wasm_lib_bg.wasm
+src/wasm-lib/lcov.info

src/wasm-lib/src/errors.rs

@@ -27,9 +27,3 @@ pub struct KclErrorDetails {
     #[serde(rename = "msg")]
     pub message: String,
 }
-
-impl From<KclError> for String {
-    fn from(error: KclError) -> Self {
-        serde_json::to_string(&error).unwrap()
-    }
-}

src/wasm-lib/src/parser.rs

@@ -1575,7 +1575,7 @@ extern "C" {
 #[wasm_bindgen]
 pub fn parse_js(js: &str) -> Result<JsValue, String> {
     let tokens = lexer(js);
-    let program = abstract_syntax_tree(&tokens).map_err(String::from)?;
+    let program = abstract_syntax_tree(&tokens).map_err(|e| e.to_string())?;
     // The  serde-wasm-bindgen does not work here because of weird HashMap issues so we use the
     // gloo-serialize crate instead.
     JsValue::from_serde(&program).map_err(|e| e.to_string())